PDF text search in JavaScript viewers commonly fails due to font encoding issues, missing text layers, lack of OCR support for scanned documents, and poor match navigation. The post explains these root causes and presents how Syncfusion's JavaScript PDF Viewer addresses them through direct text extraction from the PDF source, built-in OCR, advanced navigation controls, case-sensitive and multi-term search modes, asynchronous processing for performance, and developer APIs to customize search behavior.
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